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原创 linux leveldb 1.23 编译

leveldb编译方法总结

2023-01-14 12:31:17 751

原创【坑】glusterfs + ctdb + samba 搭建高可用服务

坑1 ： samba 版本与 libtevent版本不兼容问题所有的安装包都从这个地址下载吧，不要直接yum install下载地址：https://download.gluster.org/pub/gluster/samba/CentOS/epel-7/x86_64/ 坑2： cups服务没有安装，导致smb服务提示：can not connect to localhost...

2018-08-04 17:53:58 2007 2

原创【ceph问题分析】osd timeout and later suicide

On a Ceph Hammer (0.94.5) cluster I've seen OSDs fail multiple times when one or more clients are responding flaky (full netfilter conntrack table).The cluster is a 250 OSD cluster with roughly 30 ...

2018-07-26 13:44:24 3018

转载 [转]Boost智能指针——scoped_ptr

boost::scoped_ptr和std::auto_ptr非常类似，是一个简单的智能指针，它能够保证在离开作用域后对象被自动释放。下列代码演示了该指针的基本应用：#include <string>#include <iostream>#include <boost/scoped_ptr.hpp>class implementation{public: ...

2018-05-01 16:03:55 178

转载从osd恢复mon数据

背景介绍之前手上的一个Ceph 0.94.9集群因为突然断电，三个MON都因为leveldb的问题而无法启动。已有的解决方案从已死的集群中恢复rbd镜像-ceph官方Ceph的Mon数据重新构建工具-张鹏或者官方的文档这两个是同一个方法我这里选择第二种准备工作ceph-objectstore-tool是从osd收集mon相关数据，这个工具从Hammer(0.94系列)应该就在Ceph中默认安...

2018-02-09 11:36:09 1269 2

转载 Ceph修改OSD和Monitor的网络

转自：http://blog.youkuaiyun.com/for_tech/article/details/72382042随着Ceph的应用越来越深入，我们也遇到了越来越多的需求，本次我们将讲一下如何修改OSD和Monitor的网络。 Ceph应用中，在部署完ceph集群并运行一段时间后，我们很可能会遇到机房网络变动，或集群网络升级的情况，这时我们都期望能在尽量减少对现有Ceph集群影

2018-01-24 09:04:44 998

转载 XML-RPC简单使用

转载自： https://www.cnblogs.com/hupeng1234/p/6716263.htmlRPC（Remote Procedure Call）即远程方法调用，是一种在本地的机器上调用远端机器上的一个过程（方法）的技术。这个过程也被大家称为“分布式计算”，是为了提高各个分立机器的“互操作性”而发明出来的技术。XML-RPC的全称是XML Remote Procedure

2018-01-24 09:00:17 1288

转载一步步制作RPM包

来源 http://blog.51cto.com/laoguang/1103628一.RPM制作步骤我们在企业中有的软件基本都是编译的，我们每次安装都得编译，那怎么办呢？那就根据我们的需求制作RPM安装包吧。先来说说基本布骤:1.Planning what you want 计划做什么rpm包。软件的？库的？2.Gathering the softwar

2018-01-24 08:57:30 311

转载 openat用法

转自 http://blog.youkuaiyun.com/wang1902568721/article/details/47796173《Unix环境高级编程》的第三章和第四章出现了大量的以at结尾的函数，如openat、fstatat等，书中只是粗略的说明了下，没有实际的例子让人很难懂。[cpp] view plain copy int openat(int

2017-11-09 08:43:14 5135

转载 [C++] Boost智能指针——boost::scoped_ptr（使用及原理分析）

简介 boost::scoped_ptr是一个比较简单的智能指针，它能保证在离开作用域之后它所管理对象能被自动释放。下面这个例子将介绍它的使用： 1 #include 2 #include 3 4 using namespace std; 5 6 class Book 7 { 8 public: 9 Book()10 {11

2017-09-10 15:57:27 431

原创 ceph PG 状态恢复不了的问题（来自ceph-devel邮件）

The thing where you can't query a PG is because the OSD is throttling incoming work and the throttle is exhausted (the PG can't do work so it isn't making progress). A workaround for jewel is to r

2017-05-24 09:07:37 3250 1

原创【glusterfs】 LOCK 机制：自旋锁和互斥量

#if HAVE_SPINLOCK#define LOCK_INIT(x) pthread_spin_init (x, 0)#define LOCK(x) pthread_spin_lock (x)#define TRY_LOCK(x) pthread_spin_trylock (x)#define UNLOCK(x) pthread_spin_u

2014-11-22 10:11:10 1058

原创【算法】归并排序 merge sort

#include #include #include int a[15] = {15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1};void merge_sort (int l_num, int h_num){ int k = l_num; int m = (h_num+l_num)/2+1; int i = 0; int *b = N

2014-07-17 23:01:33 644

原创【算法】插入排序 insert sort algorithm

voidmain(){ int a[10] = {9, 8, 7, 6, 5, 4, 3, 2, 1, 0}; int key = 0; int j = 0; for (j = 1; j < sizeof(a)/sizeof(int); j++) { key = a[j];

2014-07-15 22:59:24 367

转载 Setting up an SSL secured Webserver with CentOS

This guide will explain how to set up a site over https. The tutorial uses a self signed key so will work well for a personal website or testing purposes. This is provided as is so proceed at your own

2014-06-01 22:42:49 525

原创 How to think like a Computer Scientist: 课后习题第二十一章1-5

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 19/09/2013# Copyright: (c) penglaixy 2

2013-09-20 16:04:59 648

原创 How to think like a Computer Scientist: 课后习题第十九、二十章

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 19/09/2013# Copyright: (c) penglaixy 2

2013-09-19 14:31:59 807

原创 How to think like a Computer Scientist: 课后习题第十八章9-11

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 19/09/2013# Copyright: (c) penglaixy 2

2013-09-19 10:05:26 666

原创 How to think like a Computer Scientist: 课后习题第十八章5-8

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 19/09/2013# Copyright: (c) penglaixy 2

2013-09-19 08:45:00 716

原创 How to think like a Computer Scientist: 课后习题第十八章4

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 18/09/2013# Copyright: (c) penglaixy 2

2013-09-18 21:01:15 714

原创 How to think like a Computer Scientist: 课后习题第十八章3

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 18/09/2013# Copyright: (c) penglaixy 2

2013-09-18 19:54:43 818

原创 How to think like a Computer Scientist: 课后习题第十八章2

import turtleimport timedef torn(t, order, size): if order == 0: t.forward(size) else: for angle in [85, -170, 85, 0]: torn(t,order - 1, size/2) t.r

2013-09-15 20:40:25 600

原创 How to think like a Computer Scientist: 课后习题第十八章1

import turtleimport timedef koch(t, order, size): if order == 0: t.forward(size) else: for angle in [60, -120, 60, 0]: koch(t,order - 1, size/3) t.l

2013-09-15 19:50:22 521

原创 How to think like a Computer Scientist: 课后习题第十七章5

#!/usr/bin/env pythonimport random, os.path#import basic pygame modulesimport pygamefrom pygame.locals import *#see if we can load more than standard BMPif not pygame.image.get_extended():

2013-09-15 16:17:11 900

原创 How to think like a Computer Scientist: 课后习题第十七章4

#!/usr/bin/env pythonimport random, os.path#import basic pygame modulesimport pygamefrom pygame.locals import *#see if we can load more than standard BMPif not pygame.image.get_extended():

2013-09-15 15:45:56 792

原创 How to think like a Computer Scientist: 课后习题第十七章3

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 08/09/2013# Copyright: (c) penglaixy 2

2013-09-15 14:10:41 843

原创 How to think like a Computer Scientist: 课后习题第十七章2

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 08/09/2013# Copyright: (c) penglaixy 2

2013-09-15 11:58:42 860

原创 How to think like a Computer Scientist: 课后习题第十五章6

#-------------------------------------------------------------------------------# Name: module2# Purpose:## Author: penglaixy## Created: 31/08/2013# Copyright: (c) penglaixy 2

2013-09-08 13:59:25 731

原创 How to think like a Computer Scientist: 课后习题第十五章1-5

#-------------------------------------------------------------------------------# Name: module2# Purpose:## Author: penglaixy## Created: 31/08/2013# Copyright: (c) penglaixy 2

2013-09-08 13:22:49 684

原创 How to think like a Computer Scientist: 课后习题第十四章5

#-------------------------------------------------------------------------------# Name: module2# Purpose:## Author: penglaixy## Created: 31/08/2013# Copyright: (c) penglaixy 2

2013-09-01 10:25:27 703

原创 How to think like a Computer Scientist: 课后习题第十四章4

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 31/08/2013# Copyright: (c) penglaixy 2

2013-08-31 20:27:53 561

原创 How to think like a Computer Scientist: 课后习题第十四章1

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 31/08/2013# Copyright: (c) penglaixy 2

2013-08-31 19:27:40 649

原创 How to think like a Computer Scientist: 课后习题第十四章2-3

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 31/08/2013# Copyright: (c) penglaixy 2

2013-08-31 19:26:13 904

原创 How to think like a Computer Scientist: 课后习题第十三章

#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 17/08/2013# Copyright: (c) peng

2013-08-24 11:33:49 635

原创 How to think like a Computer Scientist: 课后习题第十二章 7、8

#-------------------------------------------------------------------------------# Name: wordtools.py# Purpose:## Author: penglaixy## Created: 17/08/2013# Copyright: (c) pengla

2013-08-17 23:59:26 807